fedi:federation_icon_url
A URL to a JPG or PNG file used as the federation icon.
Recommended size: 500px, 1:1 aspect ratio
Use this field to display a custom icon next to the federation name throughout the app.
If this field is not provided, a in-app default icon will be displayed instead.
SVG files may not be supported on all platforms.
Structure
Standard HTTP/S URL
"fedi:federation_icon_url": "https://www.fedi.xyz/icon.png"